Most of the battery backup conversation assumes you have solar, or are planning to get it. But I get questions all the time from people who want power backup during outages — without the cost and complexity of a full solar installation. So let me address the standalone question directly: home battery backup without solar — does it make sense, and what are your best options?
Why Battery Backup Without Solar Actually Makes Sense
The case for standalone battery backup comes down to grid reliability in your area. If you experience frequent outages — whether from weather, aging infrastructure, or wildfires — a battery backup system provides something a generator can’t: silent, instant, no-fuel power that requires zero maintenance.
The economics are different from solar-plus-storage. Without solar generation, you’re not offsetting electricity costs — you’re paying purely for reliability and peace of mind. The financial justification is: how much does a power outage cost you? Refrigerator food loss, business disruption, hotel stays, sump pump failure, medical equipment — these have real costs.
There’s also a softer calculation. People with well pumps who lose water during outages, people with medical equipment, people with home offices or remote work setups — for these situations, the value of backup power is high and hard to quantify purely in dollars.
Portable vs. Whole-Home Battery Backup
The market divides roughly into two categories.
Portable power stations (ranging from 500Wh to 3.6kWh) handle individual devices and small loads — phone charging, laptops, fans, LED lights, a small refrigerator, CPAP machines. They’re self-contained, require no installation, and cost $300-$3,000. The Jackery Explorer series is a popular option that balances capacity, weight, and reliability. These make sense for camping, occasional outages, or people who don’t need to power their whole home.
Whole-home battery systems (10-20kWh) like the Tesla Powerwall 3, Enphase IQ Battery, Franklin WH, or Generac PWRcell connect to your home’s electrical panel and can automatically power essential circuits or your entire home during an outage. They require professional installation ($8,000-$20,000+ installed), but they operate seamlessly — no extension cords, no manually moving appliances.
How Much Capacity Do You Actually Need?
This calculation matters. Most homes consume 30-40 kWh per day total, but “essential” loads are much lower. A typical essential circuit setup — refrigerator, lights, phone charging, internet router, some outlets — runs about 5-10 kWh per day.
A 10kWh battery without solar gives you about 24-48 hours of essential power. That covers most outages. For extended outages (multi-day), you’d need either solar charging, a generator input, or multiple battery units.
If you need to run central air conditioning, electric heat, an electric range, or an electric vehicle charger during an outage, your energy needs are dramatically higher and a single battery won’t cover them for long. This is where generators still have an advantage — they can run indefinitely with fuel.
The Installation Question
Whole-home battery installation requires a licensed electrician familiar with battery storage systems, and typically requires permits. The installation connects the battery to your main panel or a subpanel containing essential circuits, plus an automatic transfer switch that disconnects from the grid during an outage (required for safety).
If you’re interested in a whole-home solution, get quotes from at least three installers. The battery hardware cost is roughly $8,000-12,000 for a single 10-13kWh unit; installation adds $2,000-5,000. Federal tax credits (30% through the IRA) apply to standalone battery storage as of 2023 — this significantly improves the economics.
For those who want a large-capacity portable option that bridges the gap, the EcoFlow DELTA Pro offers 3.6kWh expandable capacity and can connect to select home circuits with an optional hub — a substantial step up without full home installation.
Your Action Step
Map your essential loads before shopping. Walk through your home and list what you truly need during an outage: refrigerator, medical equipment, lighting, internet, heat (pump or otherwise). Look up the wattage of each appliance (usually on a label or in the manual), multiply running watts by hours per day, and you have your daily kWh need. That number tells you exactly what capacity to shop for — and whether a portable station or whole-home system fits your situation.